I am sure you can figure out that you are wrong. With a little thought, you can probably figure out why
Can you point out where I am wrong with my calculations. That product I linked to said it had a Rated Current: 1.7A/Phase. Are you disputing that?
That is 1.7 + 1.7 = 3.4A per motor. Two motors bring that up to 6.8A.
Now he said that his power supply was capable of providing 5A. So how can you get 6.8A out of a 5A supply?
Now think about 60W of power, like a 60W lightbulb. You think you can shove 60W of power into a Nema 17-sized object?
Why do you think each motor will consume 60W? Each motor has a rated voltage of 3V thus it consumes 10.2W per motor.
Yes if you connect a 3V motor to 25V then it will glow but no one is talking about that. While the OP's power supply has enough power it does not have enough current. Therefore he can not use the power supply to fully drive the motor. I said:-
you could run the motors at 1.25A per winding not quite full power but close.
You could use a switching regulator to give more current at the expense of less voltage but that is using something else as well as his power supply.
In order to use this power supply with this motor he is going to need a chopping regulator to limit the current anyway.
So if you have any real technical arguments with what I said I would be happy to discuss that with you, but vague half thought out hand waving arguments do not cut it in electronics.
but I assure you, your assertion is rubbish.
And I can assure you that you do not know what you are talking about.